BEST-IN-CLASS WOOL SOCKS MANUFACTURED IN THE USA

We put our feet through hell, so our socks must meet the highest standards—no blisters, no friction where the sock meets the shoe. 

The Merino Wool Challenge Sock - Ankle was built to take on your toughest workouts. These socks won’t wear thin or lose shape. They’ll keep your feet dry, and even after days of use, they don’t stink. They work great with the Mackall, Ballistic Trainers, and Rough Runner training shoes. 

They’re unconditionally backed by our Scars Lifetime Guarantee and proudly made in the USA.

Socks are final sale and not eligible for returns or exchanges.

Primary Features

• No show height
• Non-slip tab on the back of the heel to prevent your socks from falling into your shoes or giving you blisters
• Higher percentage of nylon and polypropylene in high-wear areas
• Deep heel pocket
• Robust cushion at high impact areas
• Extended arch support
• Reinforced toe
• Smooth toe seam
• Mesh vents
• Proudly built in the USA
• Unconditional Scars Lifetime Guarantee: If you somehow manage to wear them out, we’ll send you a new pair.

Fabric + Care

• MATERIALS:
  • 39% MERINO WOOL: breathable to keep your feet cool and dry, antimicrobial to fight stink
  • 39% Polypropylene: lightweight, breathable, and sweat-wicking to hold less heat and prevent blistering
  • 20% NYLON: adds toughness and reduces friction to prevent blisters
  • 2% SPANDEX: just enough stretch to maintain shape and fit over all the miles and all the days
• CARE INSTRUCTIONS: Machine wash cold, do not bleach, hang dry